I hope someone can help me with this.

I have lappy with propriety ATI card on.

When i used the live ubuntu cd (9.04) the graphics works perfectly for my use.

After I installed i get funny anomilies on right hand side of my screen especially when moving programs around. i.e. moving open window over another.

How do i get the same generic driver as the live cd to work on muy installation ?

Please keep it simple my use of linux is limited.

Kind regards and thanks in advance